C. Arrange inspection according to
Materials I.M. 462.
Include the cost of inspection in the unit price bid for the material
specified.

4162.02 DEFINITION OF TERMS.

Terms used in these
specifications are to be interpreted according to ASTM D 9 and rules approved
by the Board of Review of the American Lumber Standards Committee.

4162.03 MINIMUM
ACCEPTABLE SIZES.

A. Furnish material that complies with the dimensions
specified for rough or surfaced stock. Unless specified otherwise in the
contract documents, furnish rough material. Materials are classified in Table
4162.02-1, according to use:

Ensure pieces are fully
milled and processed. Unless specified otherwise, ensure all ends are neatly
cut at right angles to the specified length. Reject miscut, tapered, wedge cut,
or bull end pieces.

C. Dimensions.

Ensure material for
tongue and groove bridge floors has either the dimensions specified or the
Engineer’s approval. Unless specified otherwise, ensure that the dimensions of
all other material comply with the industry standards approved by the Board of
Review of the American Lumber Standards Committee for rough or surfaced stock
for the species furnished.

4162.04 SPECIES OF WOOD.

A. Use Douglas Fir (coast region) or Southern Pine in
all structural class timber parts and in all common class timber parts with a
nominal thickness of 2 inches (50 mm) or more.

A. Furnish either Douglas Fir (coast region) or
Southern Pine. Ensure the material is graded as provided in ASTM D 245 and by
rules of associations as approved by the American Lumber Standards Committee.

B. Use material of the grade specified for each
species. Ensure Douglas Fir (Coastal Region) is graded according to the grading
rules published by the Western Wood Products Association or the West Coast
Lumber Inspection Bureau. Ensure Southern Pine is graded according to the
grading rules published by the Southern Pine Inspection Bureau. When a stress
grade is identified as structural, apply Table 4162.05-1. When a stress grade
is identified as common class, apply Table 4162.05-2. Unless specified
otherwise, the material may be either Douglas Fir or Southern Pine.

Table 4162.05-1: Material Grades
(Structural Class)

Structural Class(a)

Grade

Light Framing:

Douglas Fir

Southern Pine

Joists and Plank:

Douglas Fir

Southern Pine

Beams and Stringers:

Douglas Fir

Southern Pine

Posts and Timbers:

Douglas Fir

Southern Pine

Dense No. 2

No. 2 Dense

Select Structural or Dense
No. 1

Dense Structural 72

Dense Select Structural
Dense Structural 86

Dense Select Structural
Dense Structural 72

(a) Structural
class is based on a nominal extreme fiber stress in bending of 1,900 psi (13
MPa) (minimum 1,850 psi (12.8 MPa)) for light framing, joists, and plank in a
repetitive member use; and for beams and stringers in a single member use.
Structural class for posts and timbers is based on a compression stress
parallel to the grain of 1,100 psi (7.6 MPa) when used as a column. When used
as a beam in a single member use, the minimum extreme fiber stress in bending
is 1,750 psi (12 MPa). Use is assumed in a location where the moisture
content will not exceed 19% for an extended period of time. Treatment for
durability (Section 4161) is also assumed, where specified.

Table 4162.05-2:
Material Grades (Common Class)

Common Class(a)

Grade

Light Framing:

Douglas Fir

Southern Pine

Joists and Plank:

Douglas Fir

Southern Pine

Posts and Timbers:

Douglas Fir

Southern Pine

No. 2

No. 2 Dense

No. 1

Dense Structural 65

Select Structural
Dense Structural 65

(a) Common
class is based on a nominal extreme fiber stress in bending of 1,500 psi
(10.3 MPa) (minimum 1,450 psi (10 MPa)) for light framing, joists, and plank
in a repetitive member use. Common class for posts and timbers is based on a
compression stress parallel to grain of 1,000 psi (7 MPa) when used as a
column. When used as a beam in single member use, the minimum extreme fiber
stress in bending is 1,450 psi (10 MPa). Use is assumed in a location where
the moisture content will not exceed 19% for an extended period of time.
Treatment for durability (Section 4161) is also assumed, where specified.

C. Ensure
that untreated wood material that requires a grade, with the exception of 45
inch (1145 mm) Terminal Posts, is stamped with the identifying quality grade
mark of an accredited grade monitoring and inspection agency approved by the
American Lumber Standards Committee (ALSC) under the Untreated Wood Program. If,
due to sizing of material, 45 inch (1145 mm) Terminal Posts to be used for
guardrail can not be stamped with a quality grade mark, ensure they are stamped
"MFG No. 1" to indicate that the posts were cut from an original
piece graded as a No. 1. Wane requirements will be waived.

D. Material
less than 3 feet (1 m) in length does not require a grade mark; however, the
grade of the material is required to be certified by the certification
statement from the mill/processor according to
Materials I.M. 462. Round wood
posts, round wood piles, and round wood poles do not require a grade, since the
grading rules apply only to sawn material.